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      <title>什么是灰度发布、金丝雀部署和蓝绿部署吗？它们各自适用于哪些场景？ - 交互式测验</title>
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    </head>
    <body>
      <div class="main-wrapper">
          <div class="quiz-container">
            <div class="quiz-header">
              <h1>什么是灰度发布、金丝雀部署和蓝绿部署吗？它们各自适用于哪些场景？ - 交互式测验</h1>
              <p>检验你对文档内容的理解程度</p>
            </div>
            <div id="quiz-content">
                <div class="quiz-body">
                    <div class="progress-bar">
                        <div id="progress-indicator"></div>
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                    <div id="hint-container" class="hint-container"></div>
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                  <button id="hint-btn" class="nav-btn" style="background-color: #ffc107; color: #333; box-shadow: 0 4px 12px rgba(255,193,7,0.3);">提示</button>
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      <script>
        const quizData = [
  {
    "question": "在进行版本发布时，如果团队的首要目标是实现“零停机”并且能够在发现问题后“秒级回滚”，那么哪种部署策略是最佳选择？",
    "options": [
      "灰度发布 (Gray Release)，因为它能逐步验证新版本。",
      "金丝雀部署 (Canary Deployment)，因为它能用少量服务器测试风险。",
      "蓝绿部署 (Blue-Green Deployment)，因为它通过切换流量到备用环境来实现即时发布与回滚。",
      "滚动发布 (Rolling Update)，因为它能逐个替换旧的实例。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "蓝绿部署的核心优势在于它维护了两个独立的、相同的生产环境。发布时，流量可以瞬间从旧环境（蓝）切换到新环境（绿）。如果新环境出现问题，只需将流量切回旧环境即可完成回滚，整个过程几乎没有服务中断时间，因此最适合需要零停机和快速回滚的场景。",
    "source": "文档中「3. 蓝绿部署（Blue-Green Deployment）」部分的「工作原理」和「适用场景」",
    "hint": "文档中提到，有一种策略的适用场景是“零停机部署”和“回滚需求”，它通过切换环境来工作。"
  },
  {
    "question": "“金丝雀部署”这个名字来源于一个历史典故。在这个部署策略中，“金丝雀”具体指的是什么？",
    "options": [
      "用于A/B测试的特定用户群体。",
      "一套自动化测试脚本，用于在新版本上线前进行回归测试。",
      "接收新版本的少量服务器，用于充当“哨兵”来检测潜在问题。",
      "部署流程中的监控和告警系统。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "这个名字来源于早期矿工带金丝雀下井以检测有毒气体的做法。在部署中，“金丝雀”就是指最先部署新版本的一小部分服务器。通过密切监控这些“金丝雀服务器”的性能和稳定性，可以在问题影响到所有用户之前，发现并解决问题，起到了预警作用。",
    "source": "文档中「2. 金丝雀部署（Canary Deployment）」部分",
    "hint": "想一想矿工和金丝雀的故事。在部署中，谁是那个最先去“探路”的角色？"
  },
  {
    "question": "灰度发布的核心工作原理是什么？",
    "options": [
      "一次性将所有用户流量切换到新版本。",
      "只将新版本部署到内部测试服务器。",
      "逐步将新版本推送给不同比例的用户子集，并持续监控反馈。",
      "同时运行两个完全相同的生产环境，并在它们之间切换。"
    ],
    "correctAnswerIndex": 2,
    "explanation": "灰度发布的核心在于“逐步”和“按比例”。它不是一次性全量更新，而是有控制地、分阶段地扩大新版本的用户覆盖范围。这个过程伴随着严密的监控，以便在问题出现时能及时控制影响范围并回滚。",
    "source": "文档中「1. 灰度发布（Gray Release）」部分的「工作原理」",
    "hint": "该策略的关键词是“逐步增加新版本的用户覆盖范围”。"
  },
  {
    "question": "根据文档描述，以下哪项不是灰度发布的主要适用场景？",
    "options": [
      "对新功能进行小范围验证，确保其稳定性。",
      "在系统升级时，希望尽量减少对全体用户的影响。",
      "在资源非常有限，无法复制一个完整生产环境的情况下进行发布。",
      "需要实现完全无感知的、瞬时全流量切换的发布。"
    ],
    "correctAnswerIndex": 3,
    "explanation": "瞬时全流量切换是蓝绿部署的典型特征，而非灰度发布。灰度发布强调的是一个“渐进”的过程，流量是逐步、按比例切分的，这与“瞬时全流量切换”的理念是相反的。灰度发布适用于新功能验证、风险控制等场景。",
    "source": "文档中「1. 灰度发布（Gray Release）」部分的「适用场景」和「3. 蓝绿部署（Blue-Green Deployment）」部分",
    "hint": "灰度发布是一个“慢慢来”的过程，而有一个策略是“一瞬间”完成切换的。"
  },
  {
    "question": "蓝绿部署策略最大的一个潜在缺点或成本是什么？",
    "options": [
      "部署过程非常缓慢，会影响发布效率。",
      "需要维护两套几乎完全相同的生产环境，导致资源成本加倍。",
      "无法进行快速回滚，一旦出问题修复困难。",
      "发布期间，新旧版本代码会同时在线上服务用户，可能导致数据不一致。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "蓝绿部署要求同时运行两个平行的生产环境（蓝色和绿色）。这意味着服务器、数据库、网络等基础设施资源需要双倍的配置，这在硬件和维护上都会带来显著的成本增加。虽然它提供了极高的可用性和回滚速度，但资源成本是其主要挑战。",
    "source": "文档中「3. 蓝绿部署（Blue-Green Deployment）」部分的「工作原理」",
    "hint": "思考一下“同时维护两个环境”在物理资源或云服务上意味着什么。"
  },
  {
    "question": "灰度发布和金丝雀部署非常相似，但从文档的描述来看，它们的一个细微区别可能在于：",
    "options": [
      "灰度发布完全没有监控，而金丝雀部署必须有监控。",
      "金丝雀部署通常指向一小部分“服务器”，而灰度发布更侧重于逐步扩大“用户”的覆盖范围。",
      "灰度发布无法回滚，而金丝雀部署可以轻松回滚。",
      "金丝雀部署成本更高，因为它需要三个生产环境。"
    ],
    "correctAnswerIndex": 1,
    "explanation": "虽然两者都属于渐进式发布，但文档描述的侧重点有所不同。金丝雀部署明确提到“新版本首先部署到少量服务器”，强调的是基础设施的子集。而灰度发布则强调“将新版本逐步推向用户的子集”，更侧重于根据用户属性（如地区、用户ID等）来划分流量，并逐步扩大这个用户群。",
    "source": "文档中「1. 灰度发布（Gray Release）」和「2. 金丝雀部署（Canary Deployment）」部分",
    "hint": "比较一下这两个策略工作原理的第一步，一个提到了“服务器”，另一个提到了“用户”。"
  }
];
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        let currentQuestionIndex = 0;
        let score = 0;
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        const prevBtn = document.getElementById('prev-btn');
        const nextBtn = document.getElementById('next-btn');
        const hintBtn = document.getElementById('hint-btn');
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          optionsListEl.innerHTML = '';
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            return;
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            // 如果这道题已经回答过，恢复状态
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          updateNavigationButtons();
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            userAnswers[currentQuestionIndex] = optionIndex;
            const currentQuestion = quizData[currentQuestionIndex];
            const isCorrect = optionIndex === currentQuestion.correctAnswerIndex;

            // 重新计算分数
            score = userAnswers.reduce((acc, answer, index) => {
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            const progressPercentage = (answeredQuestions / quizData.length) * 100;
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            nextBtn.style.display = 'block';
            hintBtn.style.display = 'block'; // 显示提示按钮

            prevBtn.disabled = currentQuestionIndex === 0;
            nextBtn.disabled = false; // 最后一题时，下一题按钮不禁用，而是用于显示报告
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            if (!quizData[currentQuestionIndex].hint) {
                hintBtn.disabled = true;
                hintContainerEl.style.display = 'none';
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            resultContainerEl.innerHTML = ''; // 清空之前的结果
            const resultBox = document.createElement('div');
            resultBox.className = `result-box ${isCorrect ? 'correct' : 'incorrect'}`;
            
            let html = `<h3>${isCorrect ? '回答正确！' : '回答错误'}</h3>`;
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            }
            html += `<div class="explanation-text">${questionData.explanation}</div>`;
            html += `<div class="source-text">来源: ${questionData.source}</div>`;
            
            resultBox.innerHTML = html;
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            // 禁用所有选项的点击事件，并高亮正确/错误答案
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                // 高亮正确答案
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                    child.style.backgroundColor = '#d4edda';
                    child.style.borderColor = '#c3e6cb';
                }
                // 如果选错了，高亮错误选项
                if (!isCorrect && index === userAnswers[currentQuestionIndex]) {
                    child.classList.add('incorrect'); // 需要添加CSS样式
                    child.style.backgroundColor = '#f8d7da';
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        function goToNextQuestion() {
            if (currentQuestionIndex < quizData.length - 1) {
                currentQuestionIndex++;
                loadQuestion();
            } else {
                showFinalScore();
            }
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            if (currentQuestionIndex > 0) {
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                loadQuestion();
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                hintContainerEl.textContent = currentQuestion.hint;
                hintContainerEl.style.display = 'block';
            } else {
                hintContainerEl.style.display = 'none';
            }
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        function showFinalScore() {
            document.querySelector('.quiz-body').style.display = 'none';
            document.getElementById('quiz-footer').style.display = 'none';

            const correctCount = score;
            const totalQuestions = quizData.length;
            const answeredCount = userAnswers.filter(a => a !== null).length;
            const wrongCount = answeredCount - correctCount;
            const skippedCount = totalQuestions - answeredCount;
            const accuracy = totalQuestions > 0 ? Math.round((correctCount / totalQuestions) * 100) : 0;
            const errorRate = totalQuestions > 0 ? Math.round((wrongCount / totalQuestions) * 100) : 0;

            const finalScoreHtml =
                '<div class="final-score-container">' +
                '<h2>答题报告</h2>' +
                '<div class="score-summary">' +
                '<div class="score-card">' +
                '<h3>得分</h3>' +
                '<p>' + correctCount + ' / ' + totalQuestions + '</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>正确率</h3>' +
                '<p>' + accuracy + '%</p>' +
                '</div>' +
                '<div class="score-card">' +
                '<h3>错误率</h3>' +
                '<p>' + errorRate + '%</p>' +
                '</div>' +
                '<div class="score-card score-details">' +
                '<table>' +
                '<tr><td>正确</td><td>' + correctCount + '</td></tr>' +
                '<tr><td>错误</td><td>' + wrongCount + '</td></tr>' +
                '<tr><td>未答</td><td>' + skippedCount + '</td></tr>' +
                '</table>' +
                '</div>' +
                '</div>' +
                '<div class="report-actions">' +
                '<button id="review-btn">回顾测验</button>' +
                '<button class="primary" onclick="location.reload()">再试一次</button>' +
                '</div>' +
                '</div>';

            let reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }
            quizContentEl.insertAdjacentHTML('beforeend', finalScoreHtml);
            document.getElementById('review-btn').addEventListener('click', reviewQuiz);
        }

        function reviewQuiz() {
            const reportEl = document.querySelector('.final-score-container');
            if (reportEl) {
                reportEl.remove();
            }

            document.querySelector('.quiz-body').style.display = 'block';
            document.getElementById('quiz-footer').style.display = 'flex';
            
            currentQuestionIndex = 0;
            loadQuestion();
            updateNavigationButtons(); // Ensure nav buttons are correctly displayed
        }

        // Event Delegation for options
        optionsListEl.addEventListener('click', (event) => {
            if (event.target && event.target.matches('li.option-item')) {
                // Check if the question has already been answered
                if (userAnswers[currentQuestionIndex] === null) {
                    const selectedIndex = parseInt(event.target.dataset.index, 10);
                    selectOption(selectedIndex);
                }
            }
        });

        prevBtn.addEventListener('click', goToPreviousQuestion);
        nextBtn.addEventListener('click', goToNextQuestion);
        hintBtn.addEventListener('click', showHint);
        
        // 初始加载
        loadQuestion();
      </script>
    </body>
    </html>
  